Senior Field Service Technician

Job DescriptionJob DescriptionOptiCool Technologies | Field-based (U.S.) with domestic/international travelTravel: ~40–65% (including occasional short-notice travel and after-hours work)On-call: Participation in a rotating 24/7 support scheduleWhy this role mattersOptiCool's Delta4T™ two-phase liquid cooling platform removes heat at the rack using refrigerant-based rear door heat exchangers and pumped refrigerant loops that integrate to facility chilled water or outdoor DX heat rejection. As we scale deployments and service coverage, this role is the front-line technical expert responsible for safe, professional, highavailability support in mission-critical data centers.Success looks likeCustomers experience confident, "white-glove" service: clear communication, clean workmanship, and disciplined safety practices.Commissioning/startups are executed to standard (MOP/SOP), with complete documentation and clean handoff to operations.High first-time-fix rate and fast restoration during break/fix events; accurate root-cause findings drive product and process improvements.Preventive maintenance and inspections reduce repeat failures; service data and logs are used proactively to prevent downtime.Partners/contractors are trained and certified to OptiCool standards when deployed under OptiCool's name.Key responsibilitiesField service execution (installation, commissioning, break/fix)Perform on-site installation support, start-up/commissioning, verification testing, and turnover for OptiCool systems in Tier 3/4 and other mission-critical environments.Diagnose and resolve mechanical, electrical, controls, and refrigerant-side issues on OptiCool equipment (RPW/RPC pumps, RDHx doors, refrigerant distribution network, and ODX heat rejection where applicable).Execute emergency/break-fix response and restoration activities in accordance with customer site rules, change management, and OptiCool service standards.Perform refrigerant best practices: evacuation, dehydration, pressure/leak testing, charging/recovery, and contamination control; document all work performed and readings captured.Preventive maintenance, inspections, and reliability improvementsExecute formal preventive maintenance visits; perform standardized inspections/audits, record results, and propose corrective actions.Identify pattern failures and recurring issues; provide actionable feedback toEngineering/Manufacturing for design-for-service and reliability improvements.Support development of PM kits, field-ready spares recommendations, and service bulletins.Remote support, monitoring, and documentation disciplineProvide phone/remote triage and troubleshooting; support 24/7 escalation as part of the on-call rotation.Support BMS/monitoring integration troubleshooting (e.g., Modbus/BACnet/SNMP where applicable) and interpret alarms, logs, and trend data to drive proactive interventions.Complete accurate service documentation: reports, photos, as-found/as-left readings, test records, and closeout notes suitable for customer and internal engineering use.Customer, contractor, and partner enablementDeliver customer and partner training (in person and remotely); coach site teams on safe operations and basic troubleshooting.Help build and maintain OptiCool's contractor/partner network by reinforcing workmanship and documentation standards and serving as a technical mentor.Maintain professional appearance and conduct as an OptiCool representative on customer sites.Cross-functional support (lab/manufacturing interface)Support factory/startup verification to ensure systems ship ready for the field; assist with troubleshooting and validation testing as needed.Assist Engineering with test setups, data collection, and evaluation of new and legacy equipment when required.Required qualifications7+ years of progressive field service experience in HVAC/R, mission-critical cooling, or closely related equipment service.EPA Section 608 Universal (or ability to obtain within 60 days) and strong refrigerant-side fundamentals (leak testing, evacuation, charging/recovery).Demonstrated experience working in mission-critical environments (data centers, telecom, fabs, labs, hospitals, etc.) with strong safety and change-management discipline.Strong mechanical and electrical troubleshooting ability (motors, VFDs, sensors, relays, power distribution basics).Ability to read P&IDs/schematics, wiring diagrams, and installation drawings; comfortable capturing and reporting measurements.Comfort with controls/BMS interfaces and basic networking concepts; able to support alarm interpretation and integrations.Excellent customer communication and documentation skills; able to write clear field reports and service summaries.Valid driver's license; ability to pass background checks as required by customer sites; passport eligible for international travel.Preferred / differentiatorsExperience supporting refrigerant-based precision cooling, pumped refrigerant loops, or two-phase thermal systems.Experience with copper piping practices (including brazing), pressure testing, and cleanliness practices appropriate for refrigerant systems.Familiarity with data center procedures (MOP/SOP/EOP), commissioning, and service SLA execution.Experience delivering technical training to customers/partners and mentoring junior technicians.Experience with FSM/ticketing tools and asset/service record management.  NFPA 70E / OSHA 10/30 and/or other relevant safety credentials.Physical requirements & working conditionsFrequent travel and work in active data center environments; occasional work in mechanical rooms and on rooftops (ODX locations).Ability to lift and move equipment and tools (team lifts as required); ability to stand, kneel, climb ladders, and work in tight spaces.Ability to work after-hours/weekends during commissioning windows or emergency response periods.OptiCool is an equal opportunity employer. This description reflects the role's general functions; duties may vary based on business needs and customer requirements.